Sphere Online Judge
sign in
News
Problems
basics
challenge
classical
none
partial
riddle
tutorial
Status
Ranking
Forum
SPOJ
time:
2025-09-05
21 : 00 : 12
All
ADA95
DOC
ASM32-GCC
ASM32
ASM64
GAWK
MAWK
BASH
BC
BF
C-CLANG
C
NCSHARP
CSHARP
C++ 4.3.2
CPP
CPP14-CLANG
CPP14
C99
CLPS
CLOJURE
COBOL
COFFEE
LISP clisp
LISP sbcl
D
D-CLANG
D-DMD
DART
ELIXIR
ERL
FSHARP
FANTOM
FORTH
FORTRAN
GO
GOSU
GRV
HASK
ICON
ICK
JAR
JAVA
JS-RHINO
JS-MONKEY
JULIA
KTLN
LUA
NEM
NICE
NIM
NODEJS
OBJC
OBJC-CLANG
OCAML
OCT
PAS-GPC
PAS-FPC
PDF
PERL
PERL6
PHP
PICO
PIKE
PS
PRLG-swi
PROLOG
PYTHON
PYPY
PYPY3
PYTHON3
PY_NBC
R
RACKET
RUBY
RUST
SCALA
SCM guile
CHICKEN
SCM qobi
SED
ST
SQLITE
SWIFT
TCL
TEXT
UNLAMBDA
VB.NET
WHITESPACE
list of classical problems
<
Previous
2
3
4
5
6
7
8
9
10
11
12
Next
>
ID
NAME
CODE
USERS
ACC %
3385
Yoda Goes Palindromic !
YODA
586
30.53
3393
Knot or Not
NOTOKNOT
10
16.67
3394
Lagrange’s Four-Square Theorem
LAGRANGE
532
46.08
3412
Higgs Boson
SAMER08H
52
19.09
3442
The last digit
LASTDIG
30111
26.98
3464
Clock
CLOCK1
66
36.47
3466
Another Longest Common Subsequence Problem
CS
6
5.66
3543
Matrica
MATRICA
56
39.90
3544
Binary Search Tree
BST
611
21.01
3545
Najkraci
NAJKRACI
188
28.92
3591
Patting Heads
PATHEADS
659
35.33
3723
Snooker
SNOOKER
459
50.51
3749
Subset Sums
SUBSUMS
4224
26.66
3752
JEDNAKOST
JEDNAKOS
601
18.45
3763
George
GEORGE
528
52.53
3791
Street
STREET
669
51.43
3898
Even Palindrome
PALDR
251
10.23
3946
K-th Number
MKTHNUM
5820
35.38
3953
Paid Roads
MMINPAID
261
27.57
3961
Journey with Pigs
MJOURNEY
133
41.31
3962
ELEVATOR II
MELE2
101
43.31
3977
Police Query
POLQUERY
302
17.37
4070
Two Professors
TWOPROF
104
14.10
4103
Extend to Palindrome
EPALIN
2588
30.59
4110
Fast Maximum Flow
FASTFLOW
3055
34.28
4157
Domino
DOMINO2
56
49.80
4164
A conjecture of Paul Erdős
HS08PAUL
2680
43.76
4166
Four colors
HS08FOUR
104
22.01
4168
Square-free integers
SQFREE
787
46.25
4172
Multiplicative digital root
DROOT
77
24.16
4176
A Knightly Pursuit
KPURSUIT
67
29.28
4177
Herding
HERDING
2730
35.22
4179
Temptation Island
TEMPTISL
655
45.09
4182
Candy (Again)
FCANDY
236
18.78
4186
Break a New RSA system
HS08CODE
138
34.12
4188
Amazing equality
HS08EQ
42
13.88
4189
Landing
LANDING
8
4.08
4198
Lego
LEGO
195
25.40
4206
Fast Maximum Matching
MATCHING
2089
29.46
4421
Irreducible polynomials over GF2
GF2
64
18.04
4458
Rainbow
RAINBOW2
38
19.53
4487
Can you answer these queries VI
GSS6
1365
23.61
4523
Binomial Coefficients
UCI2009B
210
41.58
4525
Digger Octaves
UCI2009D
391
35.55
4528
Frog Wrestling
FROGS
69
37.50
4761
Strategy game
HS09GAME
44
55.64
4785
Starship
HS09SHIP
16
31.25
4828
ZSequence
ZSEQ
53
18.02
5163
Tower of Vientiane
VIENTIAN
105
34.94
5182
Double Sorting
PAIRSORT
15
8.70
© Spoj.com. All Rights Reserved. Spoj uses
Sphere Engine
™ © by
Sphere Research Labs
.